-- @testpoint: opengauss关键字Instantiable(非保留)，作为函数名,部分测试点合理报错

--关键字不带引号-成功
drop function if exists Instantiable;
create function Instantiable(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带双引号-成功
drop function if exists "Instantiable";
create function "Instantiable"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带单引号-合理报错
drop function if exists 'Instantiable';
create function 'Instantiable'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `Instantiable`;
create function `Instantiable`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--清理环境
drop function if exists instantiable(integer);
drop function if exists "Instantiable"(integer);